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Full Moon

Dominic Ford, Editor
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The Moon will reach full phase. At this time in its monthly cycle of phases, the Moon lies almost directly opposite the Sun in the sky, placing it high above the horizon for much of the night.

The sequence of full moons through the year are often assigned names according to the seasons in which they fall. This month's will be the first to fall in spring 2018 – the Egg Moon.

Over the nights following 31 March, the Moon will rise around an hour later each day, becoming prominent later in the night. Within a few days, it will only be visible in the pre-dawn and early-morning sky. By the time it reaches last quarter, a week after full moon, it will rise at around midnight and set at around noon.

This will be the second occasion when the moon reaches full phase in March 2018. It is relatively rare for two full moons to fall within the same calendar month, since they occur at 29.53-day intervals.

It happens on average once every 2.7 years, when a full moon takes place within the first few hours of a month.

In recent time, full moons such as this have commonly been called blue moons. This usage of the term is a twentieth century innovation, however, which originally stemmed from a misprint in Sky & Telescope magazine, which appeared in March 1946.

Historically, the term blue moon has been used to describe the third of four full moons to fall within one of the Earth's seasons.

In this system, the sequence of full moons through the year are assigned names according to the seasons in which they fall. Usually only three names are needed for the full moons in each season. If a fourth fell within the same season, one of them was left without a name. This additional full moon was called a blue moon.

At the exact moment when the Moon reaches full phase, it will lie at a declination of -00°12' in the constellation Virgo , and so will appear high in the sky at all but the most extreme latitudes. It will be visible at all latitudes between 79°N and 80°S. Its distance from the Earth will be 378,000 km.

The exact position of the Moon at the time it reaches full phase will be:

Object Right Ascension Declination Constellation Angular Size
The Moon 12h45m10s -00°12' Virgo 31'33"

The coordinates above are given in J2000.0.

The sky on 31 March 2018
Sunrise
06:37
Sunset
19:15
Twilight ends
20:49
Twilight begins
05:02

14-day old moon
Waning Gibbous

99%

14 days old

Planets
Rise Culm. Set
Mercury 06:27 12:58 19:28
Venus 07:27 14:10 20:53
Moon 19:43 00:47 06:56
Mars 02:16 06:50 11:24
Jupiter 22:33 03:39 08:39
Saturn 02:15 06:55 11:34
All times shown in EDT.

Source

The circumstances of this event were computed using the DE405 planetary ephemeris published by the Jet Propulsion Laboratory (JPL).

This event was automatically generated by searching the ephemeris for planetary alignments which are of interest to amateur astronomers, and the text above was generated based on an estimate of your location.

Related news

31 Mar 2018, 08:38 EDT  –  Full Moon
08 Apr 2018, 03:19 EDT  –  Moon at Last Quarter
15 Apr 2018, 21:58 EDT  –  New Moon
22 Apr 2018, 17:47 EDT  –  Moon at First Quarter

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Fairfield

Latitude:
Longitude:
Timezone:

41.14°N
73.26°W
EST

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